GROUNDNUT ROSETTE DISEASE PDF

Groundnut rosette disease (GRD), caused by a complex of three agents: groundnut rosette assistor luteovirus, groundnut rosette umbravirus. It depends on groundnut rosette assistor virus (GRAV; Luteoviridae) for encapsidation in GRAV coat protein and for transmission by Aphis craccivora in the. SUMMARY: Groundnut rosette disease is the most important disease of groundnuts of sub-. Saharan Africa. Epidemics occur without warning. It is caused by a.

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However, smallholder farmers in Africa for a number of reasons, seldom adopted these practices. More recently it has been cultivated in other parts of the world and is an important subsistence crop in Sub-Saharan Africa.

MANAGEMENT OF GROUNDNUT ROSETTE: PAST, PRESENT, AND FUTURE

For example, the rosette epidemic in in central Malawi and eastern Zambia destroyed the crop to such an extent that the total area of groundnut grown in Malawi fell from 92, ha in to 65, ha in This will also be useful in establishing the allelic relationships. A breeding programme has been established in Malawi focussing on disease resistance, early maturity and high yield.

Sensitive and specific methods to detect the three components of rosette disease have been developed. Groundnut rosette virus disease is a very serious disease of groundnuts in Uganda.

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Groundnut Rosette Disease | Plantwise

Retrieved 13 February Breeding for multiple resistance rosette virus complex and the vector should receive high priority. Like most websites we use cookies. Resistance to rosette was identified for the first time in Asian and South American land races.

Groundnut rosette virus was first described in Africa in and causes serious damage to groundnut crops on that continent. This is to ensure that we give you the best experience possible. Created in Uganda August Inheritance of rosette resistance in groundnut was confirmed.

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groyndnut The chlorotic and green types are caused by two variants of the satellite RNA while the mosaic type is caused by infection with a mixture of both variants. InICRISAT-Lilongwe launched a program on screening of global germplasm for resistance against rosette in order to diversify the genetic base of rosette resistance.

The recommendations in this factsheet are relevant to: Groundnut plants affected take on a bushy appearance due to stunting and distortion of the growing shoots. Rosette disease has been and continues to be responsible for devastating losses to groundnut production in Africa.

Close Find out more. However, most of the rosette-resistant varieties released to date are late rosete and are not suitable to some production systems in Africa where the rainy season is short. On-farm verification and demonstration of agronomically and commercially acceptable high-yielding, rosette-resistant medium- to short-duration groundnut varieties and the package of options for integrated management of groundnut rosette needs to be intensified in the region.

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Groundnut Rosette Disease

High degree of resistance to rosette or its vector was recently identified in wild Arachis species. The disease is caused by a complex of three agents: Journal of General Virology. These sources formed the basis for rosette resistance breeding programs throughout Africa and have contributed to the development of several high-yielding, rosette-resistant groundnut varieties e.

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The virus can spread rapidly through a crop. There is no control for the virus once a plant is infected but control of the aphids will prevent further spread. For spreading types Serenut 2 plant three plants per two feet along the row.

Cookies on Plantwise Knowledge Bank Like most websites we use cookies. This page was last edited on 22 Marchat In Africa, the groundnut aphid feeds on as many as different species of plant, many of them in the Fabaceae family, and the groundnut rosette virus is presumed to have originated among these. For erect types Serenut-4T plant one and a half feet between rows and half a foot between plants along the row.